+
+ +

Source code for pylorax.api.dnfbase

+#
+# Copyright (C) 2017-2018 Red Hat, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+# pylint: disable=bad-preconf-access
+
+import logging
+log = logging.getLogger("lorax-composer")
+
+import dnf
+import dnf.logging
+from glob import glob
+import os
+import shutil
+
+
+
[docs]def get_base_object(conf):
+    """Get the DNF object with settings from the config file
+
+    :param conf: configuration object
+    :type conf: ComposerParser
+    :returns: A DNF Base object
+    :rtype: dnf.Base
+    """
+    cachedir = os.path.abspath(conf.get("composer", "cache_dir"))
+    dnfconf = os.path.abspath(conf.get("composer", "dnf_conf"))
+    dnfroot = os.path.abspath(conf.get("composer", "dnf_root"))
+    repodir = os.path.abspath(conf.get("composer", "repo_dir"))
+
+    # Setup the config for the DNF Base object
+    dbo = dnf.Base()
+    dbc = dbo.conf
+# TODO - Handle this
+#    dbc.logdir = logdir
+    dbc.installroot = dnfroot
+    if not os.path.isdir(dnfroot):
+        os.makedirs(dnfroot)
+    if not os.path.isdir(repodir):
+        os.makedirs(repodir)
+
+    dbc.cachedir = cachedir
+    dbc.reposdir = [repodir]
+    dbc.install_weak_deps = False
+    dbc.prepend_installroot('persistdir')
+    dbc.tsflags.append('nodocs')
+
+    if conf.get_default("dnf", "proxy", None):
+        dbc.proxy = conf.get("dnf", "proxy")
+
+    if conf.has_option("dnf", "sslverify") and not conf.getboolean("dnf", "sslverify"):
+        dbc.sslverify = False
+
+    _releasever = conf.get_default("composer", "releasever", None)
+    if not _releasever:
+        # Use the releasever of the host system
+        _releasever = dnf.rpm.detect_releasever("/")
+    log.info("releasever = %s", _releasever)
+    dbc.releasever = _releasever
+
+    # write the dnf configuration file
+    with open(dnfconf, "w") as f:
+        f.write(dbc.dump())
+
+    # dnf needs the repos all in one directory, composer uses repodir for this
+    # if system repos are supposed to be used, copy them into repodir, overwriting any previous copies
+    if not conf.has_option("repos", "use_system_repos") or conf.getboolean("repos", "use_system_repos"):
+        for repo_file in glob("/etc/yum.repos.d/*.repo"):
+            shutil.copy2(repo_file, repodir)
+    dbo.read_all_repos()
+
+    # Update the metadata from the enabled repos to speed up later operations
+    log.info("Updating repository metadata")
+    try:
+        dbo.fill_sack(load_system_repo=False)
+        dbo.read_comps()
+    except dnf.exceptions.Error as e:
+        log.error("Failed to update metadata: %s", str(e))
+        raise RuntimeError("Fetching metadata failed: %s" % str(e))
+
+    return dbo

+
+ +
+ +